CN103742667A

CN103742667A - Ball valve

Info

Publication number: CN103742667A
Application number: CN201410009883.2A
Authority: CN
Inventors: 丁城; 王国军; 王建华
Original assignee: Neway Valve Suzhou Co Ltd
Current assignee: Neway Valve Suzhou Co Ltd
Priority date: 2014-01-09
Filing date: 2014-01-09
Publication date: 2014-04-23
Anticipated expiration: 2034-01-09
Also published as: CN103742667B

Abstract

The invention relates to a ball valve. The ball valve comprises a fixer positioned between a valve ball and a valve body, and a limiting piece sleeved on the fixer, wherein the fixer is hermetically connected with the valve body through a sealing element; the valve ball is hermetically connected with the fixer; the limiting piece is connected with the valve body in an anti-rotation way; the sealing element is arranged between the radial end face of the limiting element and the radial inner end face of the valve body; an elastic piece is arranged between the limiting piece and the radial end face of the fixer; a plurality of second grooves are molded on the end face, which faces the fixer, of the limiting piece; a plurality of bosses are molded at positions where the fixer is matched with the second grooves; at an assembling position, the bosses are inserted into the second grooves; at a working position, the bosses retreat from the second grooves under the action of the resilience force of the elastic piece, the fixer can move towards the valve ball and be pressed against the valve ball, and the bosses are pressed against the outer end face of the limiting piece after rotating by certain angles on the fixer. The assemblies cannot move relatively at the working position, thereby achieving a reliable sealing effect between the fixer and the valve body and simplifying the structure.

Description

A kind of ball valve

Technical field

The present invention relates to valve manufacture technology field, specifically relate to a kind of ball valve.

Background technique

Ball valve is reliable owing to having sealing, and feature simple in structure, easy to maintenance, becomes one of widely used valve.It is few that the relatively side-mounted ball valve of upper-mounting type ball valve has outer leak source, and pipe stress is less on its impact, can realize the advantage such as on-line maintenance easily and be widely used.

Be illustrated in figure 1 a kind of common upper-mounting type ball valve structure of the prior art, comprise: valve ball 11, valve body 12, be positioned at the fixture 13 between valve ball 11 and valve body 12, fixture 13 1 sides are tightly connected by seal ring 14 and valve ball 11, between fixture 13 and valve body 12, be provided with spring 16, on fixture 13 opposite sides, also form shoulder, Sealing 15 is located on shoulder, and fixture 13 is tightly connected by Sealing 15 and valve body 12.In the assembly process of ball valve, valve component (fixture 13+ seal ring 14) first moves to valve body 12 one end, reserve sufficient space and place valve ball 11, as shown in Figure 2, after valve ball 11 is put into, valve component is drawn close and is pushed valve ball 11 to valve ball 11 again and realizes the sealing between fixture 13 and valve ball 11 under the effect of the spring-back force of spring 16, the distance L 2 that therefore the width L1+ valve component of the length L=Sealing of shoulder moves to valve body one end; In practical work process, as shown in Figure 3, during the entrance pressure of right side, Sealing 15 can be shifted onto its left side along shoulder by medium; As shown in Figure 4, during the entrance pressure of left side, Sealing 15 can be shifted onto its right side along shoulder by medium.

Because Sealing 15 moves around on fixture 13, produce friction, rubbing surface easily abrades on the one hand, on the other hand, during one side entrance pressure, Sealing 15 is pulled on fixture 13 or valve ball 11 end faces and can be clashed into, and the frictional force of interior outer seal lip is when inconsistent, easily causes the non-design ideal state of Sealing 15 physical location state, cause the sealing effect of this ball valve greatly to reduce, sealing stability can not well be guaranteed.

For addressing the above problem, patent documentation CN102797868A discloses a kind of roof-mounted ultra-low temperature ball valve, comprises valve body 1, valve component 2, valve ball 3, and valve component comprises seat ring 2-1 and is packed in the pressure ring 2-2 away from valve ball one end on seat ring; Seat ring is provided with the first shoulder 2-1-3 and the second shoulder 2-1-4, between the first shoulder and valve body, be provided with supporting sleeve 2-4 and spring holder 2-5, in spring holder, be embedded with stage clip 2-6, the second shoulder and valve body, pressure ring form annular seal space 2-7, spring energy-storage circle 2-7 is installed in annular seal space, pressure ring is provided with the shoulder hole 2-2-1 matching with the end of seat ring, seat ring 2-1 with pressure ring 2-2 by detachable connection of screw vertically.Stage clip 2-6 is for providing the pretightening force being tightly connected between seat ring 2-1 and valve ball 3.Concrete, on pressure ring with on seat ring, be respectively equipped with the screw mounting hole 2-2-2 and the screw 2-1-6 that match.When mounted, this end of seat ring is inserted in the shoulder hole of pressure ring, after the end face of seat ring aligns with the circular bead surface in shoulder hole, by tighten screw 2-10 in corresponding screw mounting hole and screw, realizes being fixedly connected with between seat ring and pressure ring.

In order to form Seal cage, carry out mounting spring accumulation of energy circle, make spring energy-storage circle 2-8 can not produce mobile because of flowing of medium in ball valve, guarantee that the sealing effect between valve seat 1 and seat ring 2-1 is reliable, therefore on the second shoulder of seat ring 2-1, be provided with screw, pressure ring 2-2 is provided with the screw mounting hole of coupling, in above-mentioned screw and screw mounting hole, by tightening screw, pressure ring 2-2 is fixed on seat ring 2-1, visible, the structure that forms above-mentioned Seal cage is more complicated, in addition, in ball valve assembly process, particularly packing into after valve ball 3, need to pack supporting sleeve 2-4 into so that seat ring 2-1 keeps maintaining static, now need to use frock to make spring holder 2-5 to valve body 1 one side shiftings, to reserve enough spaces between spring holder 2-5 and seat ring 2-1, place supporting sleeve 2-4, but, owing to thering is space between pressure ring 2-2 and the end face of valve body 1, seat ring 2-1 can be along valve body 1 inner side slippage, therefore, when dress supporting sleeve 2-4, need to use frock to hold valve ball 3 motionless simultaneously, cause mounting or dismounting work more complicated, special in the larger big-diameter ball valve of spring, need the even multiple personnel of multiple frocks can complete the disassemble and assemble work of ball valve.

Summary of the invention

For this reason, technical problem to be solved by this invention is the complex structure of existing ball valve, assembles difficult problem, and then a kind of ball valve simple in structure, easy to assembly is provided.

For solving the problems of the technologies described above, a kind of ball valve provided by the invention, comprises the fixture being positioned between valve ball and valve body, between described fixture and described valve body, by Sealing, is tightly connected, and described valve ball and described fixture are tightly connected; Also comprise the bounding means being sheathed on described fixture, described bounding means carries out rotation inhibiting with described valve body and is connected; Between the radial inner end face of the radial end face of described bounding means and described valve body, described Sealing is set, between the radial end face of described bounding means and described fixture, elastic component is set; Described bounding means forms some the second grooves on the end face of described fixture, and described fixture forms some projections with the position that described the second groove mates; During rigging position, described projection inserts in described the second groove; During working position, the spring-back force of described elastic component makes described projection exit described the second groove, be suitable for described fixture and move and be pressed against on described valve ball to described valve ball, and described projection is after described fixture turns an angle, and is resisted against on the exterior edge face of described bounding means.

Described bounding means forms the first groove on the axial outer end face of described valve body, the position of mating with described the first groove on described valve body is fixed with locating piece, and described locating piece is arranged in described the first groove, for realizing described bounding means, be connected with the rotation inhibiting between described valve body.

Described locating piece is welded on described valve body.

The fitting surface of described valve body and described bounding means is step surface, and the sagittal plane of described step surface is provided with groove/land structure, realizes described bounding means and is connected with the rotation inhibiting between described valve body.

Described elastic component is wavy spring.

Described Sealing is two the energy-storaging spring seal ring of realizing two way sealed is oppositely set.

Technique scheme of the present invention has the following advantages compared to existing technology,

1, in ball valve provided by the invention, during rigging position, utilize frock to push fixture, elastic component and bounding means to valve body as far as possible, the projection of fixture is inserted in the second groove of bounding means, now, Sealing is limited between the radial end face of bounding means and the radial inner end face of valve body; Put into valve ball; During working position, unclamp frock, because elastic component is arranged between the radial end face of bounding means and fixture, the spring-back force of elastic component can make fixture projection exit the second groove of bounding means, and make fixture move and be pressed against on valve ball to valve ball, the pretightening force being tightly connected between valve ball and fixture is provided; Now, bounding means is motionless, and Sealing is also motionless; During rotation fixture, because rotation inhibiting between bounding means and valve body is connected, bounding means can not rotate with the rotation of fixture, after the projection rotation of fixture, can lean with the exterior edge face of bounding means, therefore one end of fixture press with valve ball on, the exterior edge face of the other end and bounding means leans, Sealing is limited between the radial end face of bounding means and the radial inner end face of valve body; Visible, above-mentioned each element all can not produce and relatively move when working position, and sealing effect between fixture and valve body is reliable and said structure is simple; In assembly process, the spring-back force of elastic component just can make fixture be pressed against on valve ball, and after only need being rotated fixture and made projection rotation by frock and the exterior edge face of bounding means leans and can make between each element, to produce firm position relationship in ball valve, assembles easy.

2, in ball valve of the present invention, in order to realize bounding means, be connected with the rotation inhibiting between valve body, bounding means forms the first groove on the axial outer end face of valve body, and the position of mating with the first groove on valve body is fixed with locating piece, and locating piece is arranged in the first groove; Another kind of rotation inhibiting Placement is: the fitting surface of valve body and bounding means is step surface, and the sagittal plane of step surface is provided with groove/land structure, realizes bounding means and is connected with the rotation inhibiting between valve body; Locating piece can be welded on valve body, guarantees that the two is more firm.

3, in ball valve of the present invention, spring is preferably wavy spring, and wavy spring has good elasticity, and required installing space is very little, and stressed even during work, power value is more stable.

4,, in ball valve of the present invention, Sealing is the spring energy-storage seal rings of two two way sealeds that oppositely arrange, no matter ball valve inner end entrance pressure or lumen entrance pressure, and seal ring all can be realized reliable seal action.Sealing is so set and makes the simple in structure of Sealing.

Accompanying drawing explanation

For content of the present invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein

Fig. 1 is the structural representation of fixture in prior art, Sealing and valve body;

Fig. 2 is the schematic diagram in sealing part works space in ball valve in prior art;

Fig. 3 is the schematic diagram of Sealing position during the entrance pressure of right side in prior art;

Fig. 4 is the schematic diagram of Sealing position during entrance pressure, left side in prior art;

Fig. 5 is ball-valve structure schematic diagram of the present invention;

Fig. 6 is the structural representation of bounding means of the present invention;

Fig. 7 is the sectional view of fixture of the present invention;

Fig. 8 is the sectional view of bounding means of the present invention in B-B position;

In figure, reference character is expressed as: 51-valve ball, 52-valve body, 53-fixture, 531-projection, 14-seal ring, 15,54-Sealing, 16,55-bounding means, 551-the first groove, the exterior edge face of 552-bounding means, 553-the second groove, 56-elastic component, 57-locating piece, the length of L-shoulder, the width of L1-Sealing, the distance that L2-valve component moves to valve body one end.

Embodiment

Ball valve provided by the invention, as shown in Fig. 5,6,7,8, comprises the fixture 53 being positioned between valve ball 51 and valve body 52, between fixture 53 and valve body 52, by Sealing 54, is tightly connected, and valve ball 51 is tightly connected with fixture 53; Also comprise the bounding means 55 being sheathed on fixture 53, bounding means 55 carries out rotation inhibiting with valve body 52 and is connected; Between the radial inner end face of the radial end face of bounding means 55 and valve body 52, Sealing 54 is set, between the radial end face of bounding means 55 and fixture 53, elastic component 56 is set; Bounding means 55 forms some the second grooves 553 on the end face 552 of fixture 53, and the position that fixture 53 mates with the second groove 553 forms some projections 531; During rigging position, projection 531 inserts in the second groove 553; During working position, the spring-back force of elastic component 56 makes projection 531 exit the second groove 553, be suitable for fixture 53 and move and be pressed against on valve ball 51 to valve ball 51, and projection 531 is after fixture 53 turns an angle, and is resisted against on the exterior edge face 552 of bounding means 55.

The assembly process of above-mentioned ball valve is as follows: Sealing 54 is put into valve body 52; Bounding means 55, elastic component 56, put into fixture 53, bounding means 55, elastic component 56 and fixture 53 are put into after valve body 52 together, utilize frock that fixture 53 is pressed to valve body 52, the projection 531 that guarantees fixture 53 inserts in the second groove 553 of bounding means 55, the space of putting into reserve valve ball 51, puts into valve ball 51; Unclamp frock, the spring-back force of elastic component 56 makes projection 531 exit the second groove 553, and makes fixture 53 move and be pressed against on valve ball 51 to valve ball 51.Unloading process is contrary with assembly process, is not described in detail herein.

Technique scheme is core technology scheme of the present invention, during rigging position, utilize frock to push fixture 53, elastic component 57 and bounding means 55 to valve body 52 as far as possible, the projection 531 of fixture 53 is inserted in the second groove 553 of bounding means 55, now, Sealing 54 is limited between the radial end face of bounding means 55 and the radial inner end face of valve body 52; Put into valve ball 51; During working position, unclamp frock, because elastic component 56 is arranged between the radial end face of bounding means 55 and fixture 53, the spring-back force of elastic component 56 can make fixture 53 projections 531 exit the second groove 553 of bounding means 55, and make fixture 53 move and be pressed against on valve ball 51 to valve ball 51, the pretightening force being tightly connected between valve ball 51 and fixture 53 is provided; Now, bounding means 55 is motionless, and Sealing 54 is also motionless; During rotation fixture 53, because rotation inhibiting between bounding means 55 and valve body 52 is connected, bounding means 55 can not rotate with the rotation of fixture 53, therefore after projection 531 rotations of fixture 53, can lean with the exterior edge face of bounding means 55 552, therefore, one end of fixture 53 press with valve ball 51 on, the exterior edge face 552 of the other end and bounding means 55 leans, Sealing 54 is limited between the radial end face of bounding means 55 and the radial inner end face of valve body 52; Therefore known, above-mentioned each element all can not produce and relatively move when working position, sealing effect between fixture 53 and valve body 52 is reliable and said structure is simple; In assembly process, the spring-back force of elastic component 57 just can make fixture 53 be pressed against on valve ball 51, as long as rotate by frock, fixture 53 makes projection 531 rotations afterwards and the exterior edge face 552 of bounding means 55 leans can make between each element, to produce firm position relationship in ball valve, assembles easy.

As shown in Figures 5 and 6, in order to realize bounding means 55, be connected with the rotation inhibiting between valve body 52, the present embodiment provides a kind of preferred Placement, bounding means 55 forms the first groove 551 on the axial outer end face of valve body 52, the position of mating with the first groove 551 on valve body 52 is fixed with locating piece 57, and locating piece 57 is arranged in the first groove 551.

For locating piece 57 is fixedly connected with valve body 52, the present embodiment provides a kind of mode being preferably fixedly connected with: locating piece 57 is welded on valve body 52.

The mode that can implement as another kind, rotation inhibiting linkage structure between bounding means 55 and valve body 52 can also be following structure: valve body 52 is step surface with the fitting surface of bounding means 55, the sagittal plane of step surface is provided with groove/land structure, realizes bounding means 55 and is connected with the rotation inhibiting between valve body 52.

As shown in Figure 5, elastic component 56 is preferably wavy spring.Wavy spring has good elasticity, and required installing space is very little, and stressed even during work, power value is more stable.

As shown in Figure 5, Sealing 54 is two the energy-storaging spring seal ring of realizing two way sealed is oppositely set.No matter ball valve inner end entrance pressure or lumen entrance pressure, seal ring all can be realized reliable seal action.Sealing 54 is so set and makes the simple in structure of Sealing 54.The different spring energy-storage seal ring of selecting factors such as the pressure of ball valve inside, temperature, different medium, installing space during according to practical operation.

Obviously, above-described embodiment is only for example is clearly described, and the not restriction to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all mode of executions.And the apparent variation of being extended out thus or variation are still among the protection domain in the invention.

Claims

1. a ball valve, comprise the fixture (53) being positioned between valve ball (51) and valve body (52), between described fixture (53) and described valve body (52), by Sealing (54), be tightly connected, described valve ball (51) is tightly connected with described fixture (53); It is characterized in that: also comprise the bounding means (55) being sheathed on described fixture (53), described bounding means (55) carries out rotation inhibiting with described valve body (52) and is connected; Described Sealing (54) is set between the radial inner end face of the radial end face of described bounding means (55) and described valve body (52), between the radial end face of described bounding means (55) and described fixture (53), elastic component (56) is set; Described bounding means (55) forms some the second grooves (553) on the end face of described fixture (53), and the position that described fixture (53) mates with described the second groove (553) forms some projections (531); During rigging position, described projection (531) inserts in described the second groove (553); During working position, the spring-back force of described elastic component (56) makes described projection (531) exit described the second groove (553), being suitable for described fixture (53) moves and is pressed against on described valve ball (51) to described valve ball (51), and described projection (531), after described fixture (53) turns an angle, is resisted against on the exterior edge face (552) of described bounding means (55).

2. a kind of ball valve according to claim 1, it is characterized in that: described bounding means (55) forms the first groove (551) on the axial outer end face of described valve body (52), the upper position of mating with described the first groove (551) of described valve body (52) is fixed with locating piece (57), and described locating piece (57) is arranged in described the first groove (551), for realizing described bounding means (55), be connected with the rotation inhibiting between described valve body (52).

3. a kind of ball valve according to claim 2, is characterized in that: described locating piece (57) is welded on described valve body (52).

4. a kind of ball valve according to claim 1, it is characterized in that: described valve body (52) is step surface with the fitting surface of described bounding means (55), the sagittal plane of described step surface is provided with groove/land structure, realizes described bounding means (55) and is connected with the rotation inhibiting between described valve body (52).

5. according to the arbitrary described a kind of ball valve of claim 1-4, it is characterized in that, described elastic component (56) is wavy spring.

6. according to the arbitrary described a kind of ball valve of claim 1-5, it is characterized in that, described Sealing (54) is two the spring energy-storage seal ring of realizing two way sealed is oppositely set.